Problem Statement: An urban circumferential freeway is to be designed on the basis of the following information:...

Problem Statement: An urban circumferential freeway is to be designed on the basis of the following information: design year average annual daily traffic, AADT = 75,000 veh/day; the estimate of the percent of traffic occurring during the peak-hour is 9%; the percent of peak-hour traffic in the heavier direction is estimated to be 55%. The traffic mixture is expected to be similar to the current mixture of 7% trucks, 3% buses and no recreational vehicles. The PHF is estimated to be 0.9. The base free-flow speed is 70 mph. If the freeway is to be built on rolling terrain with no lateral obstructions and 12-ft lanes, determine the number of lanes needed to provide a minimum LOS of B.

1) (3 pts) Describe in 1 to 3 complete sentences:

What type of problem is this?
Describe what you are being asked to solve for.
Draw a diagram of the problem.

2) (3 pts) Describe, in complete sentences, the general method used for solving the type of problem identified in step a.

3) (2 pts) List all know information, translated into the appropriate variables. For example, if the problem specifies, “the initial speed is 70-mph”, you would list this as v_i=70 mph.

4) Solve the problem, explaining each step. You should explain what each step is, why you are using a particular equation, any assumptions you are making. You should split your paper in half vertically and use one side to write the solution and the other side for the explanation. An example of what I’m looking for in a setup is below.

5) (2 pts) In 1 to 2 complete sentences, provide an analysis or justification for your solution. Does the answer seem reasonable? Why or why not? Is it the right order of magnitude? Why or why not?

Expert Solution

This is a numerical problem in which number of lanes required for urban freeway are calculated such that freeway can be operated at LOS B. All the other data were given. All the steps for calculations are already shown and are self explanatory.

The problem is solved using the procedure laid in Highway Capacity Manual for Freeways.

The total number of lanes required to accomadate AADT= 75000 veh / day are coming to be 8, which is a realastic figure. For lesser OR more than 8 lanes LOS B wi not be maintained.

Ally Wells answered 11 months ago

A freeway is to be designed to provide LOS C for the following conditions: design hourly...

A freeway is to be designed to provide LOS C for the following conditions: design hourly volume of 5600 veh/h; PHF: 0.92; trucks: 6%; recreational vehicles: 0%; driver population: commuters and familiar drivers; right side lateral clearance: 7ft; rolling terrain; total ramp density of 0.75 ramps per mile. Determine: whether eight (four in each direction) 12 ft lanes are enough to provide LOS C.

An existing urban freeway with 4 lanes in each direction has the following characteristics: Peak hour...

An existing urban freeway with 4 lanes in each direction has the following characteristics: Peak hour volume (in peak direction) 7,070 veh/hr Trucks: 10%, 2,012 vehicles observed in the peak 15-minute time period Lane width = 11’ 4’ right side lateral clearance 1.8 ramps per mile Rolling terrain Determine the LOS in the peak hour. Clearly show your results for freeflow speed, demand flow rate, capacity, mean operating speed, and density along with the LOS.

A long segment of the suburban freeway is to be designed on level terrain. The level...

A long segment of the suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 veh/h with 15% trucks (standard mix), how many lanes will be needed on the (a) upgrade, (b) downgrade, (c) level terrain segment to provide for the level of service C? Lane widths and lateral clearances may be assumed to be 12 ft and 6 ft, respectively. Ramp...

Given: - Level terrain - extended freeway segment - Urban area with 0.9 interchanges/km - DDHV...

Given: - Level terrain - extended freeway segment - Urban area with 0.9 interchanges/km - DDHV 4050 vehicles/hour - 10% trucks, no buses, no RVs - PHF 0.95 - Full shoulder and 3.6m wide lanes Determine: - Number of lanes to operate at LOS=C

An existing four lane section of urban freeway (3 lanes each way) is located in rolling...

An existing four lane section of urban freeway (3 lanes each way) is located in rolling terrain and has 10’ travel lanes, no lateral obstructions within 5’ of the pavement edge. The roadway has 8 ramps upstream and 4 ramps downstream of the midpoint of the six mile analysis segment. The traffic stream contains 10% trucks and buses, and 4% RV’s. The peak hour directional volume is 3200 vehicles with the heaviest 15 minute volume of 800 vehicles. What is...

A freeway is being designed for a location in mountainous terrain. The expected free-flow speed is...

A freeway is being designed for a location in mountainous terrain. The expected free-flow speed is 88.5 km/h. Lane widths will be 3.6 m and shoulder widths will be 1.8 m. During the peak hour, it is expected there will be a directional peak- hour volume of 2700 vehicles, 12% large tracks and buses and 6% recreational vehicles. The PHF and driver population adjustment are expected to be 0.88 and 0.90, respectively. If a level of service no worse than...

Problem Statement: A four-lane (two-lanes in each direction) freeway is on rolling terrain with 11-ft lanes, a...

Problem Statement: A four-lane (two-lanes in each direction) freeway is on rolling terrain with 11-ft lanes, a 5-ft lateral clearance on right side and 3-ft lateral clearance on the left side of the traveled pavement. The measured free-flow speed is 60-mph. During the peak hour there are 12% large trucks and buses and 6% recreational vehicles. The freeway currently operates at capacity during the evening peak hour. If an additional 11-ft lane is added, and all other factors stay the same,...

A six lane urban freeway (three lanes in each direction) in mountainous terrain has 10-ft lanes...

A six lane urban freeway (three lanes in each direction) in mountainous terrain has 10-ft lanes and obstructions 5 ft from the right edge. For every mile of freeway, there is one interchange. The traffic stream consists of mostly commuters with a peak hour factor of 0.84, peak hour volume of 2500 vehicles, and 4% recreational vehicles. What is the LOS? Assume base free flow speed of 70 mph

A four-lane urban freeway is rolling on rolling terrain with 12-ft lanes, obstructions 2-ft from the...

A four-lane urban freeway is rolling on rolling terrain with 12-ft lanes, obstructions 2-ft from the right edge of the traveled pavement, and nine ramps within three miles upstream and three miles downstream of the midpoint of the analysis segment. The traffic stream consists primarily of commuters. A directional weekday peak-hour volume of 2400 vehicles is observed with 800 vehicles arriving in the most congested 15-min period. If the traffic stream has 10% large trucks and buses and recreational vehicles,...

Problem 3-30 (LO. 1) Compute Aiden's 2017 taxable income on the basis of the following information....

Problem 3-30 (LO. 1) Compute Aiden's 2017 taxable income on the basis of the following information. Aiden is married but has not seen or heard from his wife for over three years. Salary $80,000 Interest on bonds issued by City of Boston 3,000 Interest on CD issued by Wells Fargo Bank 2,000 Cash dividend received on Chevron common stock 2,200 Life insurance proceeds paid upon death of Aunt Margie (Aiden was the designated beneficiary of the policy) 200,000 Inheritance received...

Question